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›› 2008, Vol. 8 ›› Issue (5): 972-977.

• 材料工程专栏 • 上一篇    下一篇

城市污水厂污泥制备陶粒滤料及其特性

岳敏 岳钦艳 李仁波 高宝玉 于慧 杨晶   

  1. 山东大学环境科学与工程学院 山东大学环境学院 山东大学环境科学与工程学院 山东大学环境科学与工程学院 山东大学环境科学与工程学院
  • 收稿日期:2008-05-21 修回日期:2008-08-15 出版日期:2008-10-20 发布日期:2008-10-20
  • 通讯作者: 岳钦艳

Preparation and Characterization of Keramzite from Municipal Sewage Sludge

YUE Min YUE Qin-yan LI Ren-bo GAO Bao-yu YU Hui QI Yuan-feng   

  1. School of Environmental Science and Engineering, Shandong University School of Environmental Science and Engineering, Shandong University School of Environmental Science and Engineering, Shandong University School of Environmental Science and Engineering, Shandong University
  • Received:2008-05-21 Revised:2008-08-15 Online:2008-10-20 Published:2008-10-20
  • Contact: YUE Qin-yan

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摘要： 以城市污水处理厂脱水污泥作为主要原料，添加粉煤灰和粘土烧制陶粒滤料，考察了烧制过程中各主要因素(干燥时间、预热温度、预热时间、焙烧温度和焙烧时间)对产品性能(比表面积、堆积密度和颗粒密度)的影响，最终结合正交实验确定了污泥作为主要原料烧制陶粒的最佳工艺条件. 结果表明，污泥与辅料的最佳质量配比为：污泥:粉煤灰:粘土=2:3:1，烧制陶粒的最佳工艺条件为：干燥时间1 h，预热温度300℃，预热时间20 min，焙烧温度1100℃，焙烧时间8 min，此时制得的陶粒比表面积为4.222 m2/g，堆积密度为635 kg/m3，颗粒密度为1146 kg/m3，孔隙率为22.4%，盐酸可溶率为0.18%，破碎率为0.4%.

关键词: 城市生活污泥, 陶粒, 制备

Abstract: Sewage sludge was used as principal material to sinter lightweight keramzite aggregates. The optimized preparation conditions were selected. The impacts of main factors (dry time, preheating temperature, preheating time, sintering temperature, and sintering time) on characteristics of lightweight aggregate (specific surface area, bulk density, and granule density) were studied. The results show that the optimized mass ratio of sewage sludge to additives was that sewage sludge:fly ash:clay=2:3:1. The optimized preparation conditions were as follows: dry time 1 h, preheating temperature 300℃, preheating time 20 min, sintering temperature 1100℃, and the sintering time 8 min. Under these conditions, the characteristics of lightweight keramzite aggregates were obtained as follows: specific surface area 4.222 m2/g, bulk density 635 kg/m3, granule density 1146 kg/m3, porosity 22.4%, weight loss in hydrochloric acid 0.18%, and abrasion loss 0.4%.

Key words: sewage sludg, keramzite, preparation

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